Single-wheeled vehicle



FIG. 1 is a top view of the single-wheeled vehicle.

FIG. 2 is a perspective view of the single-wheeled vehicle of FIG. 1.

FIG. 3 is a side view of the single-wheeled vehicle of FIG. 1; the right and left side views are identical.

FIG. 4 is a front elevational view of the single-wheeled vehicle of FIG. 1; the rear elevational view is identical; and,

FIG. 5 is a bottom view of the vehicle of FIG. 1.

The portions of the article shown in broken lines form no part of the claimed design. 

The ornamental design for a single-wheeled vehicle, as shown and described. 